/*
* Copyright (c) 2007, Nubo Technologies
* 
* All rights reserved.
* 
* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
*
*    * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
*    * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
*    * Neither the name of the Nubo Technologies nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

package com.nubotech.gwt.oss.client.s3;

import com.nubotech.gwt.oss.client.AccessControlPolicy;
import com.nubotech.gwt.oss.client.Grant;
import java.util.Iterator;

/**
 *
 * @author jonnakkerud
 */
public class AccessControlPolicySerializer {
    public final String XMLNS = "http://www.w3.org/2001/XMLSchema-instance";
    public final String AWS_XMLNS = "http://s3.amazonaws.com/doc/2006-03-01/";
    
    private AccessControlPolicy policy;
    
    public AccessControlPolicySerializer(AccessControlPolicy policy) {
        this.policy = policy;
    }
    
    public String toXml() {
        StringBuffer sb = new StringBuffer();
        sb.append("<AccessControlPolicy ");
        sb.append(" xmlns=").append('"').append(AWS_XMLNS).append('"').append(">\n");
        
        // owner
        sb.append("<Owner>\n");
        sb.append("<ID>").append(policy.getOwnerId()).append("</ID>\n");
        sb.append("<DisplayName>").append(policy.getOwnerDisplayName()).append("</DisplayName>\n");
        sb.append("</Owner>\n");
        
        // access list
        sb.append("<AccessControlList>\n");
        Iterator itr = policy.getAccessControlList().iterator();
        while(itr.hasNext()) {
            Grant g = (Grant)itr.next();
            sb.append(serializeGrant(g));
        }
        sb.append("</AccessControlList>\n");
        
        sb.append("</AccessControlPolicy>");
        return sb.toString();
    }

    private String serializeGrant(Grant g) {
        StringBuffer sb = new StringBuffer();
        sb.append("<Grant>\n");
        
        // write the grantee
        sb.append("<Grantee ");
        sb.append("xmlns:xsi=").append('"').append(XMLNS).append('"');
        sb.append(" xsi:type=").append('"').append(g.getGrantee().getType()).append('"').append(">\n");
        Iterator itr = g.getGrantee().getProperties().keySet().iterator();
        while(itr.hasNext()) {
            String element = (String)itr.next();
            String value = (String) g.getGrantee().getProperties().get(element);
            sb.append("<").append(element).append(">");
            sb.append(value);
            sb.append("</").append(element).append(">\n");
        }        
        sb.append("</Grantee>\n");
        
        // permission
        sb.append("<Permission>").append(g.getPermission()).append("</Permission>\n");
        
        sb.append("</Grant>\n");
        return sb.toString();
    }
    
}
